Sign up for the Morning Brief email newsletter to get weekday updates from The Weather Channel and our meteorologists.T​he Atlantic hurricane season's 18th named storm, Sara, is likely to form in the Caribbean and might head toward the Gulf of Mexico next week,

The tropical disturbance we've been watching near Jamaica is showing signs of organization. The National Hurricane Center has designated the system Invest 99L, which means they are running extra computer models and analyses on it.

As the Atlantic hurricane season comes to a close, another potential tropical storm is forming in the Caribbean. "A tropical wave over the central Caribbean Sea is producing an area of disorganized showers and thunderstorms,